Annealing box



May 5, T925.

n. J. KOEHNLINE ET AL:

w. i v V v V W 3r I 'ATTEJRNEY 1,536,438 I. J. KOEHNLINE ET AL I May 5, 1925.

ANNEALING BOX Filed 53g 15, 1923 2 Sheets-Shem. 2

3? g i, Z

"ATTL: ENE Y.

Patented May 5, 1925- i UNITED; ST TE ,Invm JOHN KoEnNLINE, or BRIDGEPORT, AND WILLIAM .EARL Anmsu'mone, or

PATENT. OFFICE,

, .MARTINS FERRY, 01110.-

ANNEALI'NG Box.

Application m August 15, 1923. Serial No. 657,633.

To all whom it may concern:

Be it known thatwe, InvIN J OHN KOEHN- LINE and WILLIAM-1 EARL ARMSTRONG," citizens oflthe United States of America, and residents, respectively, of Bridgeport, in the county of Belmont and State of Ohio, and

Martins Ferry, in the county of Belmont and State of Ohio, have invented certain new and useful Improvements in Annealing Boxes, of which the following is a specifica- 1 tion'.

This invention relates broadly to annealing boxes, and more specifically to that type of boxes in which piles or stacks of'steel "sheets and the like are inclosed while being annealed.

The primary object of the invention is to l provide a structurally improved annealing the invention;

box adaptedto 'resi'st over relatively long periods of time the intense heat to which such boxes are sub]ected. I

A further object is to provide an annealing box in which the various sheets of the thereby enclosedpile or stack are annealed to a substantially uniform extent, thereby practically eliminating the production of under-annealed bot-tom sheets; and over-annealed topsheets.

With theseand other important objects in view, the invention resides in the features of construction,- arrangmentof parts andcombinations'of elements which will hereinafter be exemplified, reference being had to the accom anying drawings in which we have elected to disclose the invention in a form suitable forthe annealing 'o fsteel sheets of such thicknesses and dimensions as are used in themanufacture of tin plate, bnt it is to be understood that the invention may 7 be adapted to other purposes and used in modified forms without departing from the spirit of the invention; and we do not, therefore,

desire tobe limited except as may be required by'the appended claims.

In said drawings- U j Figure 1 's a transverse vertical section of Figure 2 is a top plan view of the stand; Figure 3" is a longitudinal section on line 3-3, Fig. 2;.

Figure 4 is a top andt t v Figures 5 and 6are sections of the same taken, respectively, on lines 66 and 5-5,

plan view of the cover;

Fig. 4. v i I Referring; to said drawings, 1 indicates generally a base or stand formed of iron or steel or a heat resisting alloy in a single casting and comprising a flat horizontal bed portion 1 of rectangular form adapted for receiving thereon the pilevorstack of "metal sheets to be vannealed. Surrounding said bed portion-1 and separatedtherefrom by a deep channel 2 is an upright flange-like outer wall or rim 3; Said stand 1 is provided with a plurality of suitably disposed tapered legs 4 whichform an integral part of the casting and which are of such relatively;

large size and substantial form that they effectually resist the effects of the furnace heat, oxidation and rough handling to which the standis subjected and which result in the on the under side of the stand in such man- .her that they complement each'other in the formation of a series "of, arches, as shown in Figs. 1 and 3, and, as is apparentyth s construction affords such 11180113111031 strength.

that the life of the'box is very materially prolonged as compared with that of the 5 The channel-2 is designed to receive there I a in the lower edge portion of a rectangular aforesaid pre-existing forms of stands.

cover 5 of inverted box-likeform for enclosing a pileior stack of sheets carried by the bedportion 1 of the stand. Said channel is further designed for the reception of a bed of sand of substantial thickness whereby a seal is formed between the stand 1 and the seated lower edge portion of the cover. Said channel has an inclined bottom surface 2,

' the same inclining outwardto the rim 3 and being designed to drainoutward to a point outside the seated loweredgelof the cover such water drains into the sand from the pile of sheets which, when, transferred to the bed; plate 1 from the pickling tank, are 'quite'wet with water. .The water which so drains outwardv drains from the channel 2 through one or more suitably located holes, as the hole 6 shown in 2, toward which the bottom of said channel slightly inclines or slopes. This drainage of the water from within the enclosure in large measure prevents the production of so-called smoked sheets which is consequent when blow holes so I in the sand seal have been formed by water or moisture escaping in the form of steam.

The surface of the bed portion 1" has therein a plurality of suitably arranged grooves or channels 7 which permit the insertion of chains or hooks under the pile of sheets which rest thereover for effecting removal ofsuch pile from the stand.

The cover 5 is formed in a single casting and preferably has its top 5 made of arched form, as shown in Figs. 5 and 6, thereby to afford increased resistance against warping. A rim 8 is provided about the top 5 of said cover, the sameconstituting an enclosure within which may be retained a cushionlike layer of sand for protecting said top from the abrasion and oxidation which results when the heat and flame of the furnace is permitted to play unobstructedly on the tops of annealing box covers.

A ledge 9 is formed annularly on the cover adjacent to the bottom of the rim 8, as shown, said ledge being designed as a support upon which may be carried a protective wall of fireclay, which can be renewed from time to time as required. In the absence of such fireclay wall, the ledge furnishes such additional resistance to flame abrasion at the-junction of the top 5 with the vertical walls of the cover that the life of the cove is greatly prolonged.

A plurality of pins 10 are mounted in suitably located seats or recesses 11 provided therefor in the walls of the cover, said pins being designed to provide for the attaching of the usual carrier chains of a crane I whereby the cover is handled.

It will be noted that the pile or stack of sheets placed upon'the bed portion of the stand 1 are supported in a position in which they are wholly elevated above the sand seal and that consequently the sheets of such pile or stack are uniformly subjected to heat through transference from the upright walls of the cover. In prior formsof annealing boxes the lowermost sheets of the pile are located below the level of the sand by which the seal between the stand and its cover is formed and, therefore, such sheets are shielded by the sand to the extent that they are slack, or underannealed, when the sheets thereover have been properly annealed; or,

fore stated, the production of uniformly annealed sheets is substantially assured by the employment of the construction of annealing box herein described.

Furthermore, the improved construction of box described effectually resists the ef fects of the intense heat to which such boxes are subjected to the extent that the life of the box is greatly prolonged over those ordinarily used.

What is claimed is 1 1. An annealing. box comprising a cast metal stand embodying a bed portion, an upright outer rim, and integral supporting legs, said bed portion and said rim being separated by a deep channel adapted for containing a bed of sand, the bottom of said. channel having a drainage hole therein and havingits surfaces inclined downwardly and outwardly toward said hole, said legs being of tapered form and disposed in substan tially meeting relation beneath said bed whereby they complementally form a series of arches, and a cover of inverted box-like form adapted to seat upon said stand with its lower edges embedded in the sand bed in said channel.

2. An annealing box comprising a cast metal stand embodying a bed portion and a rim separated by a channel adapted for containing a deep bed of sand, and a cover of inverted box-like form adapted 'to be superposed over said stand with its lower edges received in said channel, said cover having a rim surrounding its top and form ing an enclosure adapted to retain therein a cushion of sand, and. an external ledge formed about the walls of said cover adjacent to the base portion of the rim of the latter. 1

In testimony. whereof We afiix our signatures in presence of two witnesses.

Witnesses:

- G. 0. SMITH,

H. E. DUNLAP. 

